| Mohan & Bhangu Limited | Information & communication | 2019 |
| Momi Property Holdings Limited | Real estate | 2025 |
| Momi Transport Ltd | Transport & logistics | 2013 |
| Moonhead Games Ltd | Information & communication | 2025 |
| Moore Building Services Ltd | Construction | 2024 |
| Morris Recycling Limited | Water & waste | 2012 |
| Mother & Sun Studio Ltd | Arts & recreation | 2022 |
| Motors Car Limited | Wholesale & retail | 2024 |
| MP Alltrack Ltd | Transport & logistics | 2015 |
| Mpps Limited | Manufacturing | 2008 |
| MRJ Willis Fish Limited | Wholesale & retail | 2010 |
| MS BAL Properties Ltd | Real estate | 2022 |
| MS Commercial Heating and Plumbing Ltd | Construction | 2018 |
| Msda Transport Ltd | Transport & logistics | 2022 |
| MSN & Lunts Ltd | Wholesale & retail | 2023 |
| MSN Pharm Ltd | Wholesale & retail | 2012 |
| MSN Primary Healthcare Ltd | Wholesale & retail | 2017 |
| MSN Property Holdings Limited | Real estate | 2019 |
| MTR Lettings Limited | Real estate | 2003 |
| Mughal Massala Limited | Hospitality | 2024 |
| Mujongs Mini Trading Ltd | Wholesale & retail | 2024 |
| Mujtaba Khalid Ltd | Wholesale & retail | 2025 |
| Multi-Add Limited | Professional & scientific | 2011 |
| Multi-Function Limited | | 1993 |
| Murphy Retail Group Ltd | Wholesale & retail | 2015 |
| Murray Hall Community Enterprises Limited | Administrative & support | 2024 |
| Murray Hall Community Trust Limited | Public administration | 1999 |
| Musas Collection Limited | Wholesale & retail | 2020 |
| Musas Goods Ltd | Wholesale & retail | 2026 |
| Muscles Health and Fitness Ltd | Administrative & support | 2019 |
| Muyi Services Limited | Transport & logistics | 2024 |
| Muzy Stores(Wv) Ltd | Wholesale & retail | 2024 |
| Mwetwaz Success Ltd | Health & social care | 2015 |
| My Corner Shop Ltd | Wholesale & retail | 2023 |
| MZR Services Ltd | Information & communication | 2015 |
| N S Bathrooms and Plastics Ltd | Wholesale & retail | 2024 |
| N S I Construction Ltd | Construction | 2025 |
| N&G01 Limited | Wholesale & retail | 2025 |
| N&V Automotive Ltd Ltd | Wholesale & retail | 2025 |
| N2G Limited | Real estate | 2023 |
| Nadarnova Ltd | Wholesale & retail | 2025 |
| Nadia-Express.Com Limited | Wholesale & retail | 2017 |
| Nagoke Cargo Movers Ltd | Transport & logistics | 2025 |
| Nagoke Rapid Deliveries Ltd | Transport & logistics | 2025 |
| Nagra HGV Training Ltd | Education | 2021 |
| Nailin IT Ltd | Other services | 2022 |
| Nailinit.Tipton Ltd | Other services | 2026 |
| Nasib Naseri Ltd | Wholesale & retail | 2020 |
| Nathan Bailey Electrical Ltd | Construction | 2021 |
| Nati Compani Limited | Transport & logistics | 2024 |
| National Roof Repairs Ltd | Construction | 2025 |
| National Warm Homes Ltd | Construction | 2025 |
| Native INK Tattoo Studio Limited | Other services | 2013 |
| Nativetalks Ltd | Education | 2025 |
| Naunihal Singh Ltd | Construction | 2024 |
| Navbhatti Limited | Construction | 2019 |
| Nawab Fakhar Ltd | Wholesale & retail | 2025 |
| Neaarme Ltd | Wholesale & retail | 2025 |
| Nehabliss Ltd | Wholesale & retail | 2022 |
| Nemeckay Properties Ltd | Real estate | 2025 |
| Neptune Real Estate Ltd | Real estate | 2019 |
| Nestivia Collection Ltd | Wholesale & retail | 2025 |
| NET Beauty Cosmetics Ltd | Wholesale & retail | 2025 |
| New Blessings Takeaway Limited | Hospitality | 2020 |
| New Bloomfield Stores Ltd | Wholesale & retail | 2018 |
| New Generation Music Limited | Information & communication | 2023 |
| New RI Tyres Limited | Wholesale & retail | 2022 |
| New Sofia Groceries Ltd | Wholesale & retail | 2024 |
| New Wholesale Limited | Wholesale & retail | 2025 |
| New World Windows Limited | Construction | 2009 |
| Newby Aluminium Limited | Manufacturing | 1981 |
| Newstreet Integrated Services Ltd | Administrative & support | 2018 |
| Nexus Crane and Plant Ltd | Construction | 2019 |
| Nexus Property Renovation Ltd | Construction | 2019 |
| NF Tranpsort UK Ltd | Transport & logistics | 2025 |
| NF Transport UK Ltd | Transport & logistics | 2025 |
| Ngwa Ltd | Health & social care | 2022 |
| Nhke Midlands Limited | Hospitality | 2025 |
| Nicola Powers Limited | Real estate | 2026 |
| Nifty Products Ltd | Manufacturing | 2015 |
| Night Star Great Bridge Limited | Hospitality | 2023 |
| Night Star Pizza Palace Limited | Hospitality | 2025 |
| NINE24 Health and Education Ltd | Professional & scientific | 2022 |
| Nivara Support Ltd | Health & social care | 2025 |
| NJS Reporting Services Limited | Health & social care | 2021 |
| NK Executive Cars Ltd | Wholesale & retail | 2022 |
| Noor Halal Foods Limited | Wholesale & retail | 2013 |
| North Birmingham Travel Limited | Transport & logistics | 2012 |
| North Star Logistics Group Ltd | Transport & logistics | 2025 |
| Nova Tpms Ltd | Wholesale & retail | 2026 |
| Novamart Trading Ltd | Wholesale & retail | 2025 |
| Novanti Solutions Limited | Professional & scientific | 2024 |
| Novopal Limited | Administrative & support | 2025 |
| Nowy Kubus Ltd | Wholesale & retail | 2020 |
| Nrholdingsmidlands Ltd | Real estate | 2020 |
| Nrjd Limited | Real estate | 2026 |
| Nutrishyft Ltd | Wholesale & retail | 2026 |
| Nxwder Ltd | Wholesale & retail | 2022 |
| O'Tega Limited | Health & social care | 2015 |
| Ocean Sky Properties Ltd | Real estate | 2025 |